Well pump



June 17, 1941-. w. L. CHURCH WELL PUMP Filed July. 25, 1938 LA gwucxwbo b WALTER L. CHURCH V p: L

Patented June 17, 1941 UNITED STATE-S PATENT OFFICE I t V 2,246,416

WELL PUMP Walter L. Church, Houston, Tex. Application July 25, 1938, Serial No. 221,093

1 Claim.

This invention relates to a deep well pump and has particular relation to that type of pump whereby an operating fluid, under pressure, may be utilized to discharge the liquid from the, well.

It is another object of the invention to provide a pump of the character described embodying a tubing adapted to be located in the well and equipped with valve controlled ejector nozzles spaced the required distance apart along the tubing and which are normally open but which may be closed from above downwardly in accordance with variations in the pressures on the outside and inside of the tubing.

It is another object of the invention to provide in a pump of the character described a valve con trolled ejector nozzle wherein the valve controlling the nozzle will be held closed when the operating fluid is under pressure which exceeds the back pressure of the liquid column above the valve but which will automatically open when the pressure of the operating fluid is decreased to a point below the back pressure of the fluid column against the valve.

With the above and other objects in view the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawing, wherein:

Figure 1 shows a iragmentary, side elevation Figure 3 shows a cross-sectional view taken.

on the line 3-3 of Figure 2.

Referring now more particularly to the drawing wherein like numerals of reference designate the same parts in each of the figures, the numeral l designates a well pipe or casing permanently located in the Well and having a casing head 2 on the upper end thereof through which the tubing 3 extends, said tubing having a sealed engagement with the casing head. The tubing extends the required distance down into the well.

The tubing 3 has the valve controlled ejector nozzles 4 incorporated therein and spaced apart the required distance. Normally these ejector nozzles are submerged in the well liquid to be pumped or ejected. Each ejector nozzle mechanism embodies the pin and box coupling members 5 and 6 which are screwed together and which connect the adjacent sections of the tubing 3. The pin member 5 has the series of flow ways, or

channels, 1 extending vertically therethrough through which the liquid may flow and also has the radial ducts 8 leading inwardly to a common chamber 9 whose upper end is formed with an annular valve seat It! on which the ball valve II is located.

Above the coupling member 5 the coupling member 6 is provided with an upwardly converging Venturi passageway l2 having a restricted throat I3. The upper end of the pin member 5 has a deep centrally located socket l4 wherein the ball valve H is located and screwed into the upper end of the socket l4 there is an upwardly extended tubular nozzle l5 having an axial passageway l6 therethrough and whose outer side tapers upwardly as shown in Figure 2. The free end of the nozzle [5 terminates below the restricted throat 13. In the lower end of the nozzle l5 there is an annular valve seat l1 arranged to be closed by the valve II when the latter is lifted.

The equipment is assembled as shown in Figure 1 with the ejector nozzles, 4 spaced apart the required distance and submerged in the liquid to be pumped from the well. An operating fluid, under pressure, is then forced into the upper end of the pipe I through the supply line l8 from a suitable source of pressure. The liquid above the upper most ejector nozzle will be forced inwardly through the ducts 8 past the valve II and on upwardly through the nozzle 15 and. on up through the tubing 3. A suction will thereby be created through the Venturi passageway l2 inducing an upward movement of the liquid in the tubing beneath through the channel I. The level of the liquid in the pipe I around the tubing will thus be gradually lowered to a point beneath the radial ducts 8 of the upper ejector and thereafter the operating fluid will pass inwardly through the ducts 8' and up through the nozzle. When the pressure of the operating fluid exceeds the back pressure of the column of liquid above the corresponding valve II will be lifted against the seat I! and the nozzle 15 above will be thereby closed and the liquid in the pipe I outside of the tubing will then be forced through the ducts 8 of the next succeeding ejector beneath thus continuing the upward flow of the column of liquil in the tubing until the radial ducts 8 of said next succeeding ejector beneath are uncovered whereupon the pressure of the operating fluid will lift the corresponding valve II to close the seat above it and so on from the above downwardly.

It is contemplated that the operating fluid delivered into the pipe I through the supply line I8 will be maintained at approximately a uniform pressure, the pressure required depending on the rock pressure of the well. This rock pressure may be suificient to expel the well liquid unassisted in which event the valve II will remain open or it may be suificient to only assist in expelling the well liquid in which event the operating fluid will supplement the well pressure and the valves 11- will be alternatively lifted to close the nozzles above in accordance with variations in the pressure outside of, and inside of, the eduction tube 3.

What I claim is:

A fluid ejector pump comprising connected pin and box coupling members which are adapted to be connected into a tubing, said box coupling member having a threaded box in the lower end thereof and a Venturi passageway formed therein above the box, said pin member having a solid pin at the upper end thereof which is threaded into the box, the pin having a central axial socket which is threaded at the upper end thereof, and radial ducts communicating with the socket and extending through the pin member, a ball check valve positioned in the socket, a nozzle threaded into said socket and spaced from the walls of the Venturi passageway, whose upper end terminates adjacent the throat of the Venturi passageway in the box coupling member, said pin having channels through which fluid may be conducted from the tubing below the pin member to the Venturi passageway.

WALTER L. CHURCH. 

